Robbin represents the Madarame of this Universe

In public, Robbin comes off as polite, humble, and soft-spoken with a passion for the arts and pride in his impressive collection of art over the years. He might even self-deprecate himself as "cranky" and the like to emphasize on a virtuous display of character. In truth, Robbin is an amoral, greedy con man with an extremely self-centered view of the world and a bloated sense of self-importance, believing that he is a "God of the Art World," with merely taking the artwork of his pupils and claiming it as his own. Although Robbin was seemingly skilled enough at art to actually tutor students, he claims that the pupils that he's taken care of are his art, and uses that as an excuse to take their work as his own. Having suffered years of artist's block, Robbin resorted to extortion of his pupils to maintain his fame and cast them away the minute they were of no use to him. He is also not as poor or humble in his origins as he claims to be, as he owns a luxury car and a mansion.

Unlike Fyffe who outright abuses his volleyball team in Headstart High, Robbin hides his crimes and real personality from the public well. In the eyes of the public he is just a polite, humble and inspiring artist, even with many public protests against him, and his true personality is only known by people who know and live with him personally, namely his pupils.